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All Journal Jurnal Teknik Industri J@TI (TEKNIK INDUSTRI) AGRIEKONOMIKA Jurnal Biometrika dan Kependudukan (Journal of Biometrics and Population) Journal of Industrial Engineering Management PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Journal of Research and Technology Metode : Jurnal Teknik Industri Kaizen : Management Systems and Industrial Engineering Journal Tibuana : Journal of Applied Industrial Engineering Wahana : Tridarma Perguruan Tinggi WAKTU: Jurnal Teknik UNIPA Jurnal Teknik Elektro dan Komputer TRIAC Simulacra Industri Inovatif : Jurnal Teknik Industri Jurnal Teknik Industri Terintegrasi (JUTIN) JURMATIS : Jurnal Manajemen Teknologi dan Teknik Industri MURHUM : JURNAL PENDIDIKAN ANAK USIA DINI Best : Journal of Applied Electrical, Science and Technology Seminar Nasional Hasil Riset dan Pengabdian (SNHRP) Jurnal Bisnis, Logistik dan Supply Chain Factory Jurnal Industri, Manajemen dan Rekayasa Sistem Industri Scientica: Jurnal Ilmiah Sains dan Teknologi SENMEA Jurnal Pemberdayaan Masyarakat dan Komunitas ABDIMASTEK Integrasi: Jurnal Ilmiah Teknik Industri Research Journal of Social Economics Empowerment (ROSEE)
Muhamad Abdul Jumali
Universitas PGRI Adi Buana Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Social Sciences Other

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Optimasi Persediaan Produk Pipa dengan Karakter Permintaan Lumpy Intermiten di Industri Manufaktur Harno Suntoko; Muhamad Abdul Jumali
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.56390

Abstract

This study develops an optimized inventory control policy for pipe products characterized by intermittent demand in a manufacturing company in Surabaya. Monthly demand data from January to December 2024 were analyzed using the Average Demand Interval (ADI) and the Coefficient of Variation Squared (CV²) to classify demand behavior. The results indicate an ADI of 2.6 and a CV² of 0.82, confirming a lumpy intermittent demand pattern. Based on this classification, inventory parameters were determined for a 15-day lead time. The proposed policy yields a safety stock of 18 units and a reorder point of 25 units at a 95% service level. Implementation of the integrated forecasting–inventory approach reduces annual inventory costs by 21.7% and improves material availability from 89% to 95%. Findings demonstrate that demand classification-based inventory decisions provide measurable operational and economic improvements for project-oriented manufacturing environments.
Pengukuran Efisiensi Proses PPDB dengan Pendekatan Work Measurement Vitri Nur Hidayati; Muhamad Abdul Jumali
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.56419

Abstract

This study aims to measure the process efficiency of student admission (PPDB) using a work measurement approach by comparing manual and digital systems at a private vocational school in Surabaya. A quantitative–comparative design was applied to ten complete admission process records, evaluating three indicators: process time, administrative error rate, and staff workload. Data were collected through structured time study, error logging, and daily task records during one admission period. The results indicate that the digital system reduces process time by 50–90%, decreases the error rate from 15% to 5%, and improves staff productivity by minimizing overtime. The three indicators were integrated into a composite efficiency index adapted from Overall Equipment Effectiveness (OEE), yielding 18.7% for the manual system and 80.7% for the digital system. These findings confirm that digitalization significantly enhances service process performance and provides a measurable industrial engineering framework for improving administrative efficiency.
ISSN 2615-5788 Print (2615-7764) Vol 12 No. 2 @ 2025 Wildan Surya Wijaya, Muhammad Risfan Ramadhani. Jurnal Teknik Elektro dan Komputer TRIAC 2025 Yunia Dwie Nurcahyanie, Muhamad Abdul Jumali https://journal.trunojoyo.ac.id/triac Wildan Surya Wijaya; Muhammad Risfan Ramadhani; Yunia Dwie Nurcahyanie; Muhamad Abdul Jumali
Jurnal Teknik Elektro dan Komputer TRIAC Vol 12, No 2 (2025): Oktober 2025
Publisher : Jurusan Teknik Elektro Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/triac.v12i2.31256

Abstract

The use of small-scale solar energy is one of the strategic solutions for electricity needs in remote areas and outdoor activities. As the need for portable electrification increases, the development of solar backpack systems is becoming a practical and sustainable alternative. This research aims to design and test a portable backpack system based on a thin film solar panel with a capacity of 20 Wp, equipped with a 12V solar charge controller and a 7.2 Ah battery. The system is designed with two outputs, namely 12V DC and 5V USB, to support lightweight devices such as LED lights and smartphones. The test was carried out at two different locations, namely Mount Lorokan and Mount Penanggungan, with data taken which included latitude, longitude, solar elevation angle, PV voltage, PV current, and output power. The measurement results show that there is a variation in the performance of solar panels according to geographical conditions and solar elevation angles. On Mount Lorokan, the peak power reaches 8.55 W at an angle of 75°, while on Mount Penanggungan the maximum power is slightly higher, which is 8.6 W at an angle of 78°. Mount Lorokan excels at maximum power, Penanggungan shows more stable performance at low to medium angles. This research contributes to the development of a portable electrification system based on renewable energy that supports power continuity in locations without access to electricity.
Organizational Commitment Drives Safety Culture Outcomes Jumali, Muhamad Abdul; Kristina, Anita; Rusdiyantoro, Rusdiyantoro
Jurnal Teknik Industri Vol. 27 No. 1 (2026): February
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/JTIUMM.Vol27.No1.33-46

Abstract

This study addresses the lack of integrated frameworks explaining how organizational safety culture influences individual safety behavior in small-scale industrial settings. The research aims to develop a structural model where organizational commitment mediates the relationship between safety culture and safety behavior. A quantitative survey was conducted in a briquette manufacturing firm involving 130 production workers. Data were collected using validated questionnaires and analyzed using Structural Equation Modeling (SEM) with AMOS software. The model demonstrated satisfactory fit indices (CFI = 0.957; RMSEA = 0.059), and mediation analysis via bootstrapping confirmed that organizational commitment fully mediates the effect of safety culture on behavior. These findings highlight that improving safety behavior requires more than formal procedures; it depends on the internalization of shared cultural values through commitment. The study contributes to the development of diagnostic and intervention models for enhancing worker safety in labor-intensive industrial settings.
MODEL KINERJA LAYANAN RESTORAN CEPAT SAJI BERBASIS SELF-SERVICE ORDERING Rismadanti Kumairoh; Muhamad Abdul Jumali
Jurnal Bisnis, Logistik dan Supply Chain (BLOGCHAIN) Vol. 6 No. 1 (2026): Jurnal Bisnis, Logistik dan Supply Chain
Publisher : Program Studi Administrasi Bisnis, Institut Bisnis dan Informatika (IBI) Kosgoro 1957

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55122/blogchain.v6i1.1987

Abstract

Penelitian ini mengembangkan model kinerja layanan restoran cepat saji berbasis self-service ordering dengan mempertimbangkan waktu tunggu dan beban kerja staf. Studi dilakukan pada satu gerai berkapasitas tinggi di Surabaya menggunakan pendekatan kuantitatif. Data dikumpulkan dari pengukuran waktu tunggu sekitar 100 transaksi, catatan 200 transaksi berdasarkan mode pemesanan, data beban kerja staf pada 14 shift kerja, serta survei kepuasan pelanggan terhadap 60 responden. Analisis dilakukan menggunakan statistik deskriptif, korelasi Pearson, dan regresi linier berganda. Hasil penelitian menunjukkan bahwa waktu tunggu berpengaruh negatif terhadap kepuasan pelanggan, sedangkan self-service ordering dan beban kerja staf berpengaruh positif dan signifikan. Model regresi memiliki nilai koefisien determinasi sebesar 0,389, yang menunjukkan bahwa ketiga variabel menjelaskan 38,9% variasi kepuasan pelanggan. Self-service ordering muncul sebagai faktor paling dominan. Temuan ini menegaskan pentingnya pengelolaan kanal pemesanan dan penataan beban kerja staf untuk meningkatkan kinerja layanan restoran cepat saji.
ANALISIS KUANTITATIF PERMINTAAN DAN LEAD TIME UNTUK EFISIENSI PERSEDIAAN BAHAN BAKU UTAMA PAKAN TERNAK Muhamad Abdul Jumali; Pigunawati
Jurnal Bisnis, Logistik dan Supply Chain (BLOGCHAIN) Vol. 6 No. 1 (2026): Jurnal Bisnis, Logistik dan Supply Chain
Publisher : Program Studi Administrasi Bisnis, Institut Bisnis dan Informatika (IBI) Kosgoro 1957

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55122/blogchain.v6i1.1994

Abstract

Ketidakpastian permintaan dan variasi lead time pemasok berdampak signifikan terhadap efisiensi persediaan bahan baku pada industri pakan ternak. Penelitian ini menganalisis secara kuantitatif permintaan dan lead time sebagai dasar penentuan kebijakan persediaan berbasis data operasional perusahaan pada tiga bahan baku utama, yaitu jagung, bungkil kedelai, dan vitamin premix. Analisis dilakukan melalui perhitungan rata-rata dan simpangan baku permintaan, kebutuhan selama masa tunggu, persediaan pengaman, titik pemesanan ulang, serta ukuran pemesanan ekonomis yang disesuaikan dengan batasan pemasok. Hasil menunjukkan bahwa titik pemesanan ulang masing-masing berada pada kisaran 28 unit untuk jagung, 12 unit untuk bungkil kedelai, dan 5 unit untuk vitamin premix, dengan ukuran pemesanan sebesar 600 unit, 345 unit, dan 147 unit. Penerapan kebijakan ini menurunkan total biaya persediaan tahunan sebesar 83–93 persen dibandingkan kebijakan sebelumnya, sehingga memberikan dasar pengambilan keputusan persediaan yang lebih efisien dan terukur.
The labor culture of Madurese siwalan farmers: morality and attitude Muhamad Abdul Jumali; Anita Kristina; Khairunisah binti Kamsin
Agriekonomika Vol 15, No 1: April 2026
Publisher : Department of Agribusiness, Faculty of Agriculture, Universitas Trunojoyo Madura, Indonesi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agriekonomika.v15i1.31193

Abstract

This qualitative study explores the labor culture of siwalan farmers in Madura, Indonesia, highlighting how religious values and prayer practices are integrated into daily agricultural routines. Departing from conventional productivity metrics, it examines how adherence to Islamic principles particularly respecting prayer times defines work ethic and productivity within this community. Based on in-depth interviews and observations, the study reveals how spirituality shapes decision-making, work schedules, and attitudes toward labor. The findings emphasize the role of religious commitment in guiding agricultural activities, suggesting that spiritual fulfillment is central to productivity and well-being. This research contributes to a nuanced understanding of indigenous work cultures in Indonesia, especially how religious frameworks shape perceptions of labor beyond economic measures. Insights from this study are also valuable for policymakers and development practitioners engaging with agricultural communities, and they enrich broader academic discussions on the intersection of religion, work, and economy in non-Western contexts.
Dynamic Economic Order Quantity (EOQ) Model Integrating Sustainability and Industry 4.0 for Inventory Cost Efficiency Ramadhan, Tania Cahyani; Jumali, Muhamad Abdul
WAHANA Vol 78 No 1 (2026): Wahana Tridarma Perguruan Tinggi
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/wahana.v78i1.11395

Abstract

Efficient inventory management has become a critical challenge for the manufacturing industry due to market demand fluctuations, digital transformation, and sustainability pressures. This research proposes a dynamic EOQ framework that integrates Monte Carlo simulation, sustainability principles, and Industry 4.0 technologies to support adaptive inventory decision-making.The research employs a quantitative exploratory approach utilizing operational data from a corrugated box manufacturing company in Surabaya, Indonesia. A Monte Carlo simulation with 1,000 iterations is used to model stochastic demand uncertainty and determine the optimal order quantity.The results show that the proposed dynamic EOQ model can reduce inventory costs by approximately 8–12 percent compared to the conventional EOQ approach. The optimal order quantity is identified as 70,890 kg per cycle, while the integration of sustainability principles successfully reduces material waste by around 5 percent per production cycle. This research contributes theoretically by integrating sustainability concepts and Industry 4.0, including the Internet of Things (IoT) and closed-loop supply chain concepts, into inventory management optimization. This integration has proven to improve resource use efficiency and reduce production waste. The findings confirm that implementing a sustainability- and digital technology-based EOQ model can be an effective strategy to enhance economic efficiency while supporting environmental responsibility in the manufacturing industry in the Industry 4.0 era. Practically, the research offers a more adaptive inventory control framework for the manufacturing industry
Analisis Kompetensi dan Pengalaman Kerja Sebagai Determinan Produktivitas Sales Hotel Lusi Ermawati; Muhamad Abdul Jumali
Integrasi: Jurnal Ilmiah Teknik Industri Vol 11 No 1 (2026): Integrasi : Jurnal Ilmiah Teknik Industri
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/integrasi.v11i1.1276

Abstract

Industri perhotelan di Surabaya menghadapi tingkat persaingan yang semakin ketat sehingga peningkatan produktivitas tenaga penjualan menjadi prioritas utama dalam menjaga daya saing. Penelitian ini bertujuan untuk menganalisis pengaruh kompetensi dan pengalaman kerja terhadap produktivitas sales hotel. Metode penelitian menggunakan pendekatan kuantitatif eksplanatori dengan responden sebanyak 40 tenaga penjualan dari hotel berbintang, dipilih melalui purposive sampling. Instrumen penelitian berupa kuesioner skala Likert yang telah diuji validitas dan reliabilitasnya, serta dianalisis menggunakan regresi linier berganda dengan bantuan perangkat lunak SPSS. Hasil penelitian menunjukkan bahwa kompetensi berpengaruh positif signifikan terhadap produktivitas (t = 3.217; p = 0.003) dan pengalaman kerja juga berpengaruh positif signifikan (t = 2.865; p = 0.008). Secara simultan, kompetensi dan pengalaman kerja memberikan kontribusi sebesar 71,2% terhadap variasi produktivitas tenaga penjualan (Adjusted R² = 0.712). Temuan ini mengonfirmasi bahwa sinergi antara kompetensi dan pengalaman kerja merupakan faktor determinan yang esensial dalam peningkatan produktivitas sales hotel. Penelitian ini memberikan kontribusi pada pengembangan manajemen sumber daya manusia di sektor perhotelan melalui strategi pelatihan berbasis kompetensi dan pengelolaan pengalaman kerja yang berkesinambungan.
Co-Authors Akhmad Solikin Alfi Rohmatil Maulidah Anita Kristina Anita Kristina Anita Kristina Anita Kristina, Anita Anjeli Riza Umami Annastiti Widyanti, Anggi Antonius Cahyono Dharmawan, Rizqi Firmansyah, Magnino Anggita Gilang Nanda Dwy Pradana Hafid, Ahcmad Harno Suntoko Ilham, Aditya Jati Abdhi Wasesa, Andarmadi Kamsin, Khairunisah Binti Khairunisah binti Kamsin Kinanti, Dindha Aprilia Lusi Ermawati Lusi Ermawati Manik Ayu Titisari Maubila, Alorinda Zantia Mufidah, Nailul Muhammad Risfan Ramadhani Muhammad Tony Gusmanto Nadhiroh, Alfatun Nafisah, Nihayatun Nailul Mufidah Nata, Aan Hadi Pamungkas, Muhammad Aji Pigunawati Pradipta, Arjuna Raffi Prasisko, Bily Pratama, Fatur Angga Pratama, Mohamat Rizki Prianto, Yoga Chandra Putri Nia Luki Patmasari Putri Rahayu, Nitabian Iftita Ramadhan, Tania Cahyani Rismadanti Kumairoh Rizki, Gusti Rizky Dwi Hernando Rusdiyantoro Rusdiyantoro Rusdiyantoro Rusdiyantoro, Rusdiyantoro Sabbiqun, Diego Dzikrul Sagita Rochman Shilfira Nova Pratiwi Siswoyo, Qurrota Ainiy Rezita Suntoko, Harno surya Wijaya, WILDAN Ulum, Moch Bahrul Umami, Anjeli Riza Vitri Nur Hidayati Wildan Surya Wijaya Yanatra Budi Pramana Yitno Utomo Yunia Dwie Nurchayanie